﻿    <p>      
      The <em>IfcRelConnectsElements</em> objectified relationship
      provides the generalization of the connectivity between
      elements. It is a 1 to 1 relationship. The concept of two
      elements being physically or logically connected is
      described independently from the connecting elements. The
      connectivity may be related to the shape representation of
      the connected entities by providing a connection geometry.
    </p>
    <ul>
      <li>In this case the geometrical constraints of the
      connection are provided by the optional relationship to the
      <em>IfcConnectionGeometry</em>. The connection geometry is
      provided as a point, curve or surface within the local
      placement coordinate systems of the connecting elements.
      </li>
      <li>If the connection geometry is omitted then the
      connection is provided as a logical connection. Under this
      circumstance, the connection point, curve or surface has to
      be recalculated by the receiving application.
      </li>
    </ul>
    <blockquote class="history">
      HISTORY&nbsp; New entity in IFC1.0.
    </blockquote>